Vibrator switch construction



Aug. 25, 1953 P. c. RECK ETAL VIBRATOR SWITCH CONSTRUCTION Filed Nov. 24, 1950 FQKQE V mnw wmu 2 $.55 ZJQL, Q 98 Z w Gm H a U8! I. 7 P O a, 2 2 z e grwem/to w 1 57759 CQECK Lew/.5 JSTERN &

Patented Aug. 25, 1953 VIBRATOR SWITCH CONSTRUCTION Peter 0. Beck and Lewis J. Stern, Adrian, Mich., assignors to Sperti Faraday Inc., Adrian, Mich.,

a corporation of Ohio Application November 24, 1950, Serial No. 197,432

Claims.

This invention relates to features of electric switch construction and mounting.

This invention has utility when incorporated in multiple operation or vibratory type of electric switches, more particularly as in signal circuits, as for the operation of bells, gongs, buzzers and chimes. There is simplified configuration of parts contributing to manufacturing economies, with advantanges for adjustment as well as efliciency over extended periods of use.

Referring to the drawings:

Fig. 1 is a side elevation, with parts broken away, of an embodiment of the invention in a ong operator;

Fig. 2 is a side elevation, with portions in section, of the plunger or striker for the gong of Fig. 1, at the energized or thrown position of the plunger;

Fig. 3 is a View similar to Fig. 2, wherein instead of an insulation adjusting screw head to open the breaker switch as in Fig. 2, a metal stem from the plunger or core carries an insulation washer threaded on the stem, the position here being that of non-thrown or idle position for the plunger;

Fig. 4 is a section on the line IV-IV, Fig. l, on an enlarged scale, showing one of the posts for the breaker switch mounting;

Fig. 5 is a detail, in plan view, of the upper plate of the breaker switch, with dotted line showings in the central port therethru of the plunger or core and the insulation head or washer clearance to pass thru such port; and

Fig. 6 is a plan view detail of the second or lower plate for the breaker switch, as complementary to the plate of Fig. 5, the dotted line showing about the port suggesting the striking or breaker switch opening position of the insulation head or washer.

The general structure A base or plate provides mounting for an audible signal or gong 2. Also mounted on the base I is a pair of angle brackets 3, 4, providing a pair of aligned openings 5, 6, for a guide or sleeve 1 of non-magnetic material. Insulation 8 about the sleeve I between the brackets 3, l, locates an electric coil 9 to be energized and thereby draw into its magnetic field a polygonal plunger or core 10. A compression spring H is of sufficient expansion property to poise or shift the temporary magnet core l0 partially out of the magnetic field to be developed by the coil 9.

A remote signal-operating switch l2 as closed places electric conductor line [3 in circuit to a terminal I4 at the plate I. A lead I5 from the terminal [4 is to arm I6 at plate I1, switch contact I 8 of which is normally engaged by complementary contact IQ of a second breaker plate 20. The plate 29 has an arm 2! with a lead 22 therefrom to the coil 9. From the remote portion of the coil 9 there extends a lead 23 to a terminal 24 at the plate I in a companion position as to the terminal M. An electric conductor line 25 is connected to this terminal 24, and with the line l3 there is thus completed electric circuit for energizing the coil 9, effective thru its magnetic field to draw into such field the core or plunger 10. In this operation, the points or contacts l8, l9, are separated, resulting in deenergizing of the coil 9, for the spring II which had been overcome by the energized coil, now to act in shifting the core I0 for the contacts I8, !9, as a switch to be again closed for a repetition of the cycle of operations as the switch I 2 be still closed.

Ranges of current and voltage may be adopted to conform to special conditions for installation, in some of which the ampere turns of the wire in the coil 9 may be selected to be in keeping therewith, as well as the gage of the wire and strength or character of the insulation. A counterelectromotive force factor may be minimized or fully eliminated as a disturbing element by placing a resistance 26 between the plates I1, 20, in parallel with the points or contacts l8, l9.

The breaker assembly One on each side of the opening 5 in the angle bracket 3 (Figs. 1, 4) upper side is a weld 21 anchoring a head 28 of a machine screw or ex ternally threaded post 29, 39, which are axially approximately coplanar with the opening 5 and parallel to the base I. On each post 29, 30, is a spacer or sleeve 3| having terminally thereagainst remote from the bracket 3 a minor outside diameter insulation sleeve 32. Insulation washers, as a pair 33 on the sleeve 32 against the sleeve 3| provide support at openings 34 (Fig.

6) in the plate 20 as riding over the posts 29, 30 and the sleeves 32. Additional or second washer pair 33, against the upper side of outer arms 35 of the plate 20, are on the posts 29, 30, and the sleeves 32 to provide support at openings 36 in the plate I! (Fig. 5). This breaker plate assembly is completed by a third pair of insulation washers 33 against the plate l1. Washer 31, lock washer 38 and nut 39 may complete this assembly, in which the plate I! may 3 be flat or in a plane, while an intermediate arm 40 of the plate 29 may be flexed or pitched slightly upward sufficiently for the contact l9 to ride against the complementary contact l8.

The breaker operator The plate I? has aligned with the core l an opening 4| sufiiciently large for clearance of an actuator for the breaker to pass thru this opening 4| but to engage the arm 40 of the plate having an opening 42 somewhat smaller in diameter than the opening 4|.

The actuator proper is an insulation disk 43, in Figs. 1, 2, being the head of an insulation screw having a stem 44 entering the core ID to provide adjustment. A side slot 45 in the core I0 may provide for pinch anchoring of the insulation screw 43, 44, as a lock feature in a minimum number of parts adjustment maintenance assembly. The external diameter of the disk 43 has peripheral clearance to pass thru the opening 4| of the plate I1 and engage about the rim of the opening 42 of the plate 29.

The energizing of the coil 9 causing the core I9 to compress the spring carries with the core ill the disk 43 in the passage of the disk 43 thru the opening 4| in the plate H and to strike the bounds of the opening 42 in the arm 40 of the plate 29. This flexed arm 49 is thereby shifted toward planar position with the arms of the plate 20. At this thrown limit there is provided a stop or insulation disk 46 adapted to be lodged on the top of the non-magnetic sleeve 1 of the plunger guide.

The adjustment of the spacing for the disk 43 relatively to this stop 46, determines the stroke length for the core Ill. The core ID has an extension or striker pin 41 protruding thru an opening 48 at internally flanged portion 49 of the sleeve 7, which provides a ledge or stop for the spring away from the core H]. A nicety of impinging action may be achieved for the tip of the pin 4'! in its striking against the audible signal imparting element or gong 2.

A modification (Fig. 3) shows in lieu of the stem 44 integral with the insulation disk 43, a stem 59 fixed with and protruding upwardly from the core l9 thru the openings 42, 4|, in the plates 20, H, and there having a threaded end upon which is fixed by thread assembly thereon an insulation disk 5|, functioning similarly to the insulation disk 43. A nut 52 on threaded end 53 of the stem 59, has a fiber or look section 54 as friction holding means for maintaining the adjustment for the disk 5|. This assembly adjustment locking coacts as does the pinch locking from the slot 45 on the stem 44. The stop disk 46 on the sleeve 1 surrounds the stem 50 as with the stem 44.

Rapid assembly is achieved, due to the straight stacking on the posts in approaching parallelism with the faces of the sleeves and washers, of the breaker plate pair ll, 29. The flexed arm is shielded against overstrain exposure during operation. Manufacturing economy is in the flat plate general form.

The disks 43, 5|, are insulation elements carried by and movable with the plunger core I0. The polygonal configuration of the core l9 provides holding region, as for a wrench, as there be occasion to adjust the range for reciprocation determined by the stop elements 46. The adjustment is thru turning of the element 43 for its stem 44 to move relatively to the core l0 and at such adjustment to be frictionally held by the pinch action developed from the slot 45, or by the nut 52 on the stem 50.

The plates I1, 20, in their mounted position on the pair of posts 29, 30, are parallel, except for the flexing of the arm 40 of the plate 20. Accordingly, the pair of plates establish a mean plane which is perpendicular to or at right angles to the plane thru the axes of the posts 29, 30. The plate IT has its arm or terminal connection I6 at one side of the complementary contact pair 3, l9, while the plate 20 has its arm or terminal connection 2| at the opposite side of such contact pair.

The plate I! of general diamond shape, as mounted, has at its central region, the opening 4| in alignment with the stroke direction for the plunger Ill. The companion three-armed plate 20, has its lesser diameter opening 42 as to the opening 4|, also in the stroke direction for the plunger H). The lesser diameter provides in its bounds an impact-receiving-region for the element 43 or 5| in its movement toward the stop 46.

What is claimed and it is desired to secure by Letters Patent is:

1. For a vibrator switch construction comprising a base, a bracket extending therefrom, a coil on one side of the bracket, and a core for the coil, there being an opening for the core thru the bracket; a pair of posts fixed with the bracket, one on each side of the opening and extending oppositely from the coil, said posts and opening defining a plane parallel to the base, insulation means along the posts, a pair of plates mounted on the posts and by said insulation means spaced from the posts, the bracket and each other, said plates between the posts having openings partially out-of-register, and further said plates providing a switch of a pair of complementary contacts, one of which contacts is on a flexible arm of one of said plates, said arm, spaced from its contact, having an impact-receiving-region, and an insulation element movable with the core, upon energizing of the coil, to pass clear of one of said openings and strike the impact-receivingregion in proximity to the other opening and thereby operate the switch at the plates.

2. For mounting on a pair of parallel posts, a planar switch plate having a contact and a terminal connection spaced from the contact, a second plate having coplanar and of general 'U -form, a pair of arms with connection therebetween, one of said arms having a terminal connection, there being a third relatively flexible intermediate arm having a contact complementary to the contact of the other plate, each of said plates having three openings in a row with the end openings for the posts, and a switch actuator operable thru the intermediate openings.

3. For an electric-coil-energized plunger having a stem, a switch construction comprising a pair of parallel posts; a generally diamondshaped planar plate having a first contact, a three-armed plate having an intermediate arm with an opening bounded by an impact-receivingregion, said intermediate arm extending to a second contact complementary to the first contact, insulation means mounting the plates in approximate parallelism to each other on the posts, there being an opening in the diamond-shaped plate aligned with and of greater extent than the intermediate arm opening of the three-armed plate, said stem extending thru the aligned openings in the plates to carry an insulation element beyond the larger opening remote from the smaller opening, whereby upon plunger action the element traverses clear of the larger opening to impact the bounds of the smaller opening and thereby flex the intermediate arm of the three-armed plate for operating the switch.

4. For an electric vibrator construction comprising a base with a bracket extending therefrom, a coil on one side of the bracket, a core for the coil, there being an opening for the core thru the bracket, a stem from the core carrying an insulation disk for movement with the core, and a circuit for energizing the coil; a pair of posts rising from the bracket parallel to the stem, a pair of contact-carrying plates having insulation mounting on and extending between the posts approximately parallel to the diametrical plane of the coil, said plates providing a switch in said coil-energizing circuit, and means in said circuit in series with the switch at the plates which means coacts to energize the coil to shift the core and disk to operate the switch at the plates.

5. The electric vibrator construction of claim 4 wherein one of said plates has an opening with clearance for the stem-carried disk to pass therethru for said stem-carried insulation disk to contact the other plate in flexing the latter plate to operate said switch.

PETER C. REICK. LEWIS J. STERN.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,005,899 Stout Oct. 17, 1911 1,140,432 Ames May 25, 1915 1,240,351 Little Sept, 18, 1917 1,241,139 Neahr Sept. 25, 1917 1,983,068 Cardone Dec. 4, 1934 1,984,512 Anderson Dec. 18, 1934 2,104,399 Kuhn Jan. 4, 1938 2,288,014 Mullen et a1 June 30, 1942 2,344,523 Stern Mar. 21, 1944 

